Pontygwaith takes its name from a blast furnace built in the early 16th century, though by 1863 it was described as a shapeless ruin The location of the furnace was at the north end of what today is Furnace Road and the only documented proof of the structure is in a contract drawn up in 1614 between John Hanbury of Pontypool and Richard ap Rhys of Llantrisant for the supply of charcoal to the "furnace of Penrees" (Penrhys).
Between 1849 and 1856, the Taff Vale Railway opened the Maerdy Branch from Porth, including a station at Pontygwaith Halt. Passenger services were withdrawn from Pontygwaith Halt in 1914 but passenger services continued along the line until 1964. The line closed completely after the last train in August 1986 after coal from Mardy Colliery was raised through Tower Colliery. Since 2005, the southern section from Porth to Pontygwaith is now the A4223 Porth and Lower Rhondda Fach Relief Road (Porth Bypass). The upper section including the section passing Pontygwaith has become a branch of the Taff Trail cycleway.
- Historic Rhondda, An Archaeological and Topographical Survey 8000 BC - AD 1850, Paul R. Davis, Hackman (1989) pg. 34 ISBN 0-9508556-3-4
- Gilmore-James, Terence (2012). "Thomas, Mansel TReharne (1909-1986)". National Library of Wales. Retrieved 17 August 2018.
- "BRE Group" (PDF). BRE Group. Retrieved 17 August 2018.
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